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Onyx Brief

The archive, declassified. Pure white page, pure-black ink and a solid black strike, one phosphor green for the machine's verdict, and a rare oxblood audit seal. Austere, premium, high-contrast.

cool-neutral, phosphor green (#0A8F4F).

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Colours

3 signature colours, 5 neutrals, 4 semantic.

Signature

Onyx#0A0A0B
Phosphor#0A8F4F
Bright Phosphor#12C46B

Neutrals

bg#FFFFFF
surface#FFFFFF
text#0A0A0B
muted#6E6E74
bordertransparent

Semantic

success#0A8F4F
warning#A05A00
error#9B1C12
info#2F5F69

monochrome, phosphor, high-contrast, archive, editorial

Using it

Do

  • Keep the page pure white and the ink pure black.
  • Use phosphor only as the verdict / live value.
  • Keep oxblood rare and procedural.
  • Separate by shadow and the strike, never colour edges.

Avoid

  • Use beige/cream grounds.
  • Add gradients or a third bright accent.
  • Set small phosphor text on white without black support.

Try a remix

Drop Onyx Brief onto any UI language and swap the art style. The preview recolours live.

UI language
Palette
Onyx Brief
Art style